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Phil, Mechanical Engineer

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Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial

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My Rinnai 431F propane heater squeeks, chirps as if a bearing

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My Rinnai 431F propane heater squeeks, chirps as if a bearing is starting to fail. 3 years old, however it is installed in a basement and runs all year round. I have had the front and side panels off trying to find the noise. I expect that either the circulator fan or heater air fan needs to be replaced. The noise seems to be comming from behind the curcuit board. I am sure that I can do the component replacement. Where can I buy parts and any advice would be appriciated

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